Filtering controlling indices in summation
Filtering controlling indices in summation
Hi every body
I have a problem filtering time index in summation . in my model i have time index ( t ) which is defined as a set , in one equation i want to filter the domain of time index , actually in my summation i want to do the summation over a part of set t (not the whole set
: for example i want my summation to be done over time index t but just for
[t-p(i,l)+1,t]
where p(i,l) is a parameter , i wrote it this way but it doesnt look to be correct ,here is part of my code
sets
/ t index of time /1,hl
/activity /a1*a4
(alias(activity,i,j
/m index of staffs /1*8
/l index of projects /1,2
parameters
/h(l) due date of projects /1 8,2 5
table
p(i,l) duration of activities
2 1
a1 2 3
a2 5 4
a3 3 2
; a4 3
variables
(integer variable x(i,m,l,t
co4(m,l) ..sum((i,t)$(t>=(t-p(i,l)+1)),x(i,m,l,t))=l=1
If any body can help me please it would be appreciated
--
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at https://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.
RE: Filtering controlling indices in summation
Hi Razie
You could use the ord operator
sum((i,t)$(ord(t)t>=(ord(t)-p(i,l)+1)),x(i,m,l,t))=l=1;
Cheers
Renger
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of razie
Sent: Sonntag, 7. Februar 2016 17:14
To: gamsworld
Subject: Filtering controlling indices in summation
Hi every body
I have a problem filtering time index in summation . in my model i have time index ( t ) which is defined as a set , in one equation i want to filter the domain of time index , actually in my summation i want to do the summation over a part of set t (not the whole set
: for example i want my summation to be done over time index t but just for
[t-p(i,l)+1,t]
where p(i,l) is a parameter , i wrote it this way but it doesnt look to be correct ,here is part of my code
sets
/ t index of time /1,hl
/activity /a1*a4
(alias(activity,i,j
/m index of staffs /1*8
/l index of projects /1,2
parameters
/h(l) due date of projects /1 8,2 5
table
p(i,l) duration of activities
2 1
a1 2 3
a2 5 4
a3 3 2
; a4 3
variables
(integer variable x(i,m,l,t
co4(m,l) ..sum((i,t)$(t>=(t-p(i,l)+1)),x(i,m,l,t))=l=1
If any body can help me please it would be appreciated
--
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at https://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.
--
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at https://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.
Re: Filtering controlling indices in summation
در یکشنبه 7 Ùوریهٔ 2016ØŒ ساعت 23:08:27 (UTC+3:30)ØŒ razie نوشته:
Hi every body
I have a problem filtering time index in summation . in my model i have time index ( t ) which is defined as a set , in one equation i want to filter the domain of time index , actually in my summation i want to do the summation over a part of set t (not the whole set
: for example i want my summation to be done over time index t but just for
[t-p(i,l)+1,t]
where p(i,l) is a parameter , i wrote it this way but it doesnt look to be correct ,here is part of my code
sets
/ t index of time /1,hl
/activity /a1*a4
(alias(activity,i,j
/m index of staffs /1*8
/l index of projects /1,2
parameters
/h(l) due date of projects /1 8,2 5
table
p(i,l) duration of activities
2 1
a1 2 3
a2 5 4
a3 3 2
; a4 3
variables
(integer variable x(i,m,l,t
co4(m,l) ..sum((i,t)$(t>=(t-p(i,l)+1)),x(i,m,l,t))=l=1
If any body can help me please it would be appreciated
thanks for your help Renger.
--
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at https://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.